The effect of high temperature on reinforced concrete structures
The article represents the behaviour of reinforced concrete and its components (concrete and reinforcement) under high temperature. The comparing analysis of the experimentally and theoretically obtained results has been performed. The carried out experiment has disclosed that the mechanical propert...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Vilnius Gediminas Technical University
2010-03-01
|
| Series: | Engineering Structures and Technologies |
| Subjects: | |
| Online Access: | https://www.bme.vgtu.lt/index.php/EST/article/view/7502 |
| _version_ | 1819292206136033280 |
|---|---|
| author | Robertas Zavalis Arnoldas Šneideris |
| author_facet | Robertas Zavalis Arnoldas Šneideris |
| author_sort | Robertas Zavalis |
| collection | DOAJ |
| description | The article represents the behaviour of reinforced concrete and its components (concrete and reinforcement) under high temperature. The comparing analysis of the experimentally and theoretically obtained results has been performed. The carried out experiment has disclosed that the mechanical properties of concrete alters differently in cases of temperature rise and theoretical reference. The most visible difference has been noticed at a temperature of 100 °C (Fig 4, Fig 5). The main fire resistance calculation basics are discussed. The temperature fields of the reinforced concrete element cross-section are calculated according to the standard fire curve using the program COSMOS/M of the finite element method. Concrete thermal properties, thermal conductivity and specific heat capacity dependence on temperature are taken into account in the model (Fig 10, Fig 11). By means of this model, the corresponding algorithm (Table 2) was made and can be used for obtaining temperature distribution for the reinforced concrete element of different cross-sections. According to the received temperature fields and applying the zone method, the influence of differences in theoretical and experimental results on element load bearing capacity is determined. The residual strength of the element considering the theoretical reduction curve of concrete strength is 5% larger than the results obtained in cases of 30 and 60 minutes heating. 90 and 120 minutes heating indicates that element strength is only 2% larger than the results calculated experimentally. The reduced zone dimension determined due to a decrease in the reduction coefficient at a temperature of 100 °C has affected residual element strength.
Aukštos temperatūros įtakos betono ir armatūros savybėms bei jų bendrai elgsenai analizė.
Santrauka
Nagrinėjama gelžbetonio ir jo komponentų (betono ir armatūros) elgsena aukštoje temperatūroje, tiriamos betono stiprumo ir deformatyvumo savybės kintant temperatūrai. Atliekama teorinių ir eksperimento būdu gautų rezultatų lyginamoji analizė. Aptariami pagrindiniai atsparumo ugniai skaičiavimo principai. Pasinaudojus baigtinių elementų metodo programa COSMOS/M, suskaičiuoti gelžbetoninio elemento skerspjūvio temperatūros pasiskirstymo laukai pagal standartinio gaisro kreivę. Pagal gautus temperatūrinius laukus zonų metodu nustatyta teorinių ir eksperimento rezultatų skirtumo įtaka elemento laikomajai galiai.
First Published Online: 16 May 2013
Reikšminiai žodžiai: gelžbetonis, temperatūra, gaisras, temperatūrinės zonos, atsparumas ugniai |
| first_indexed | 2024-12-24T03:50:51Z |
| format | Article |
| id | doaj.art-8568940078174d4696596b6667b0aae5 |
| institution | Directory Open Access Journal |
| issn | 2029-882X 2029-8838 |
| language | English |
| last_indexed | 2024-12-24T03:50:51Z |
| publishDate | 2010-03-01 |
| publisher | Vilnius Gediminas Technical University |
| record_format | Article |
| series | Engineering Structures and Technologies |
| spelling | doaj.art-8568940078174d4696596b6667b0aae52022-12-21T17:16:36ZengVilnius Gediminas Technical UniversityEngineering Structures and Technologies2029-882X2029-88382010-03-012110.3846/skt.2010.02The effect of high temperature on reinforced concrete structuresRobertas Zavalis0Arnoldas Šneideris1Vilniaus Gedimino technikos universitetas, Saulėtekio al. 11, LT-10223 Vilnius, LietuvaVilniaus Gedimino technikos universitetas, Saulėtekio al. 11, LT-10223 Vilnius, LietuvaThe article represents the behaviour of reinforced concrete and its components (concrete and reinforcement) under high temperature. The comparing analysis of the experimentally and theoretically obtained results has been performed. The carried out experiment has disclosed that the mechanical properties of concrete alters differently in cases of temperature rise and theoretical reference. The most visible difference has been noticed at a temperature of 100 °C (Fig 4, Fig 5). The main fire resistance calculation basics are discussed. The temperature fields of the reinforced concrete element cross-section are calculated according to the standard fire curve using the program COSMOS/M of the finite element method. Concrete thermal properties, thermal conductivity and specific heat capacity dependence on temperature are taken into account in the model (Fig 10, Fig 11). By means of this model, the corresponding algorithm (Table 2) was made and can be used for obtaining temperature distribution for the reinforced concrete element of different cross-sections. According to the received temperature fields and applying the zone method, the influence of differences in theoretical and experimental results on element load bearing capacity is determined. The residual strength of the element considering the theoretical reduction curve of concrete strength is 5% larger than the results obtained in cases of 30 and 60 minutes heating. 90 and 120 minutes heating indicates that element strength is only 2% larger than the results calculated experimentally. The reduced zone dimension determined due to a decrease in the reduction coefficient at a temperature of 100 °C has affected residual element strength. Aukštos temperatūros įtakos betono ir armatūros savybėms bei jų bendrai elgsenai analizė. Santrauka Nagrinėjama gelžbetonio ir jo komponentų (betono ir armatūros) elgsena aukštoje temperatūroje, tiriamos betono stiprumo ir deformatyvumo savybės kintant temperatūrai. Atliekama teorinių ir eksperimento būdu gautų rezultatų lyginamoji analizė. Aptariami pagrindiniai atsparumo ugniai skaičiavimo principai. Pasinaudojus baigtinių elementų metodo programa COSMOS/M, suskaičiuoti gelžbetoninio elemento skerspjūvio temperatūros pasiskirstymo laukai pagal standartinio gaisro kreivę. Pagal gautus temperatūrinius laukus zonų metodu nustatyta teorinių ir eksperimento rezultatų skirtumo įtaka elemento laikomajai galiai. First Published Online: 16 May 2013 Reikšminiai žodžiai: gelžbetonis, temperatūra, gaisras, temperatūrinės zonos, atsparumas ugniaihttps://www.bme.vgtu.lt/index.php/EST/article/view/7502reinforced concretetemperaturefirefields of temperaturefire resistance |
| spellingShingle | Robertas Zavalis Arnoldas Šneideris The effect of high temperature on reinforced concrete structures Engineering Structures and Technologies reinforced concrete temperature fire fields of temperature fire resistance |
| title | The effect of high temperature on reinforced concrete structures |
| title_full | The effect of high temperature on reinforced concrete structures |
| title_fullStr | The effect of high temperature on reinforced concrete structures |
| title_full_unstemmed | The effect of high temperature on reinforced concrete structures |
| title_short | The effect of high temperature on reinforced concrete structures |
| title_sort | effect of high temperature on reinforced concrete structures |
| topic | reinforced concrete temperature fire fields of temperature fire resistance |
| url | https://www.bme.vgtu.lt/index.php/EST/article/view/7502 |
| work_keys_str_mv | AT robertaszavalis theeffectofhightemperatureonreinforcedconcretestructures AT arnoldassneideris theeffectofhightemperatureonreinforcedconcretestructures AT robertaszavalis effectofhightemperatureonreinforcedconcretestructures AT arnoldassneideris effectofhightemperatureonreinforcedconcretestructures |